Door-lock



Y INVENTOR ATTORNEYS.

Patented Mar. 2, l18,86.

DOOR' LOOK.

(Mode.) l l 1 G. G. AGKERSON 8v J.']'.-SHY.

TNBssBs @M MMb/ trice.

A'rnNtr GABRET G. ACKERSONVAND .IULIUS FRENCH SHY, OF ST. LOUIS, MISSOURI.

DOOR-LOCK.

SPECIFICATION forming part of Letters Patent No. 337.108, dated March 2, 1886.

(Model.)

To all whom it may concern:

Be it known that we, GARRET G. AcKER- soN and J ULIUs FRENCH SHY, both of St. Louis, and State of Missouri, have invented a new and Improved Door-Lock, of which the following is a full, clear, and exact description.

Our invention relates to locks more especially adapted for use on hotels and dwellinghouse doors, and has for its object to provide a simple, inexpensive, strong, and durable lock which in its construction and use shall combine security of fastening with protection against picking, and also against looking through the key-holes of the lock when the bolt is projected by the key.

lhe invention consists in certain novel features of construction and combinations of parts of the lock, all as hereinafter fully described and claimed.

Reference is to be had to the accompanying drawings, forming part of this specification, in which similar letters of reference indicate corresponding parts in all the figures.

Figure l is a rear face view of thelock with the inner plate of the case removed and with the latchingy and locking bolts withdrawn. Fig. 2 is a rear face view of the lock,and shows the latching-bolt projected,and illustrates the action of the key in projecting the lockingbolt when the key is passed into the lock from its outer side, and also shows how the key moves the inner guard-plate to cover theA inner key-hole of the lock. Fig. 3 is a rear face view of the lock, illustrating the action of the key in projecting the locking-bolt when the key is passed into the lock from its inner side, and also shows how the key moves the outer guard-plate to cover the outer key-hole of the lock. Fig. 4 is a transverse section of the lock, taken on the line :v a', Fig. 3, and with the inner plate of the lock in place. Fig. 5 is a like view, taken on the line y y, Fig. 3. Fig. 6 is a like View, taken on the line z z, Fig. 3. Fig. 7 is an edge view of the reversible latch-bolt. Fig. 8 is a view of the outer key-hole guard-plate. Fig. 9 is an inside face View of the locking-bolt. Fig. 10 shows the tumblerof the locking-bolt, and Fig. 1l is a 5o view 0f the inner key-hole guard-plate.

The letter A indicates the lock-case, which has holes at a through its outer and inner'side plates, ac, respectively, through which holes the screws are to be passed to i'asten'the lock to a door. Studs a3 on the body of the case A enter holes in the inner plate, a2, so that a screw passed through said plate into a threaded hole in a stnd,a*,of the case holds the plate a2 to place.

The latching-bolt B is made in two parts, a part, B', which has back end lugs, b, against which one of thelugs c c of the dog C, fixed to the spindle C, acts as the spindle is turned either way to throw back the bolt B, and also has a pin or stud, b', which enters a hole in the other part, B2, of the bolt, which carries the beveled head b'iadapted to enter the striking-plate of the lock, (not shown,) and which plate is to be fixed to the door-casing. Both. part-s B Bl of bolt B are provided with a slot, as at b3, through which a stud, b4, on the lockcase passes to act with the head b2 to guide the vlatching-bolt as it is withdrawn or projected. p

As shown in Figs. 6 and 7, the part B2 of 7 bolt B may be reversed on the studs b b4, to present the bevel of the head b2 to either side, thus adapting the lock for use on either right or left hand doors. by its coil d on the stud b of bolt B and bearing by its opposite ends or limbs on the lockcase studs a" b, acts normally to project the latching-bolt, and the spring may readily be removed when the part B2 of the bolt Bis to ,be reversed, and may as readily be replaced.

To the front plate, a', of the lock-case A is fixed a stud, E, which preferably is square or has a squared upper part, so it may be engaged at its opposite sides by stop-studs of the key-hole guard-plates and the locking-bolt tumbler, as presently explained. Next the outer plate, a', of the lock-case A is placed the plate F, which hasa pendent portion, f, forniing a guard, which may be set over the keyhole G in the outer plate, a', of the lock-case. This guard-plate F, (see Fig. 8,) has a slot, f', into which a guide pin or stud, a5, on the plate a enters, and also has a slot, f2, through which the lock-case stud E passes, and the upper wall or margin ofthe slotf'l is provided with a stop-stud, f3, which is adapted to lock at one side or the other of the stud E. A

A wire spring, D, placed Y Y' I OOl spring, F', fixed to plate F, acts against the case-stud a, to force the inner part of the plate F downward after the plate has been lifted and shifted by the key H, so as to lock the studf3 either behind the case-stud E, for holding plate F back so its guard f does not cover the key-hole G, as in Figs. 1 and 2, or with the stud f in front of the stud E, for holding the plate F forward, so its part f covers said key-hole G, as in Fig. 3.

Back of the guardf the plate F has a notch, j, against the inclined sides of which the bit h of t-he key H acts to shift the guard-plate F with the locking-bolt I when the key is passed into the lock from :its inner face or through the key-hole J, made in the inner lock-plate, a2, out of line with the opposite key-hole, G, of the lock. The locking-bolt I (see Fig. 9) has a head or end part, t', adapted to enter the striking or cat-ch plate (not shown) fixed to the door-casing, and alsohas a slot, Z', through which the casestnd E passes to guide the bolt, and the bolt has two notches, i2 t, against the inclined sides of which the key-bit h may act to shift the bolt when the key is entered, respectively, through the outer key-hole, G, and inner-key hole, J.

The letter K (see Fig. 10) indicates the tumbler of the locking-bolt,which latter has a pin or stud, t, which enters a hole, k, in the tumbler, so as to cause the tumbler to be moved with t-he bolt, and the tumbler has a slot, k', the upper wall or margin of which is provided with a stop-stud, k2, which stud is adapted to catch either in front of or behind the case-stud E, which passes through the slot la', and so as to hold the bolt I projected or withdrawn. A spring, K', fixed to the tumbler K, and acting on case-stud a", holds the tumbler down on the stud E, and the tumbler is positioned so that the key-bit will lift its stud k above the stud E, to allow the bolt I to be shifted by the key H when the key is passed into either key-hole G or J. Next the inner plate, a2, ofthe lockcase A, and over the tumbler K, is placed the inner plate, L, (see Fig'. 11,) which plate has a pendent portion, Z, adapted to be moved over the inner hey-hole, J, of the lock, and has also a guide-slot, Z', through which the pin or stud t" of bolt I passes, and also a slot, Z2, through which the case-stud E projects, and astop-stud, Z, at the upper margin of slot Z2, is adapted to catch either in front of or behind the stud E, to hold the guard Z over the key-hole J, as in Fig. 2, or back and clear of thekey-hole, asin Figs. 1, 3, and 5, a spring, L', fixed to the plate L, and acting on the case-stud a, serving to hold the plate down to the stud E in either position. The guard-plate L has a notch, Z, against which the bit h of the key H, when passed into the key-hole G, is adapted to act for lifting the plate soits stud Z3 clears the stud 4 E, and for shifting the plate at the same time that the locking-bolt I is shifted by the key. A lug, M, fixed to the bottom edge of the lockcase A, stands between the lower ends of the guards f Z of plates F L, respectively, and prevents either of the guards being pushed away from the respective side plates, a' a, of the lock-case, and re-enforees the guards, so it will be difficult to break them, and it will be quite impossible to insert a wire or instrument of any kind into the lock-case from the side opposite that in which the key is held, for the purpose of picking the lock, and it will be difticult to introduce explosives into the lock.

The lock-case plates a2 a', respectively, are provided with round holes g j, opposite the key-holes lG J, respectively, to admit the end stud, lz', ofthe key H, for steadying the key;

but the guardsfZ, when over the respective v key-holes G J, eft'ectually prevent persons looking through the key-holes ofthe lock.

The operation ofthe locking-bolt and keyhole guards,brietly stated, is as follows We will suppose the locking-bolt I is withdrawn from the catch-plate oris unlocked, as in Fig. 1. The guards fZ then will not cover the key-holes G J. Should the key H be inserted in the outer keyhole, G, until its bit H strikes the opposite inner lockplate, a', and should the key then be turned to project the bolt I, by acting iu its notch i, the key-bit h will clear the guard-plate F, so as not'to move it, and will act in the notch Z of guard-plate L as the bolt I is projected to throw theI plate L, so its guard Z stands in front of or over the inner key-hole, J, as shown in Fig. 2. Should the key H be inserted through the door into theinner key-hole, J, to project the bolt I, and until its bit h strikes the opposite or front plate, a', ofthe lock-case, and should the key then be ,turned to throw the bolt by acting in its notch Z3, the bit h will clear the guard-plate L,so as not to move it, and will act in the notch f* of guard-plate F, as the bolt is thrown, to carry the guard f over the .outer key-hole, G, as shown in Figs. 3 and 5.

It is obvious that the arrangement ofthe keyholes G J out of line with each other at opposite sides of the lock-case, and the construction of the locking-bolt with twokey-bit-receiving notches are in themselves elements of protection in the use of the lock; but these features, combined with the key hole guard-plates, greatly increase the security of thelock. The locking-bolt may be tted with more than one tumbler and the key be correspondingly shaped to throw the bolt from either face of the lock.

All parts of the lock are very simplein construction, allowing cheap manufacture, and the lock is not liable to get out of order, and is particularly adapted to hotels and dwellinghouses. l

Instead of a key havinga-round barrel, atlat key may be provided, andthe holes]l g in the lock-case may be dispensed with, thus a'ording additional security when thelock is locked from the outside. l

Having thus described my invention,\vliat I claim as new, and desire to secure by Letters Patent, is-

1. In a lock, the latching-bolt B, made in two parts, B' B', said part B' having studs() b,

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on which the spindledog acts, and provided with a pin, b, entering a hole of part B, and said part B2 having the latching-head b, and the parts B B2 having slots, as at b3, in combination with astrid, as at b4, on thelock-case, and a retracting-spring, as at D, coiled around the pin b and bearing at its ends on the pins -b4 a", substantially as shown and described,

whereby the part B2 maybe reversed for right or left hand locks, as set forth.

2. A lock comprising a case, A, having keyholes, as at G J, formed through its opposite side plates and out of line with each other, a locking-bolt, as at I, having two key-bit-receiving notches, il i3, into which the key may be passed from the opposite key-holes. and key-hole guard-plates, as atF L, provided with guards f Z, respectively, adapted to cover said key-holes G J, and said plates F L, provided also with keylbit-receiving notches j" Z, respectively, adapting them to be throw-n bythe key as the bolt is thrown, substantially as herein set fort-h.

3. In a lock, the combination, with the case A, provided with key-holes GJ, made through its opposite sides out of line with each other, and provided, also,with a stud, E, of the keyhole gnardpl ates F L,adapted to cover the keyholes G J, and to be moved by the key as the key throws the bolt, and said key-hole guardplates F L, having stop`lugs f Z3, respectively, adapted to lock against the stud E ofthelockcase, and springs, as at F' L', adapted to hold the plates F L over or clear of the respective key-holes G J, substantially as herein set forth. 3 5

GARRET G. ACKERSON. J ULIUS FRENCH SLIY.

Witnesses to G. G. Ackerson:

A. B. NIvEN, N. T. ROBERTS. Witnesses to J. F. Shy:

F. J. LANGENBERG, F. H. HUNICKE. 

